usp10: Implement ScriptStringCPtoX.
diff --git a/dlls/usp10/usp10.c b/dlls/usp10/usp10.c
index 14f6fe9..448153f 100644
--- a/dlls/usp10/usp10.c
+++ b/dlls/usp10/usp10.c
@@ -574,9 +574,46 @@
*/
HRESULT WINAPI ScriptStringCPtoX(SCRIPT_STRING_ANALYSIS ssa, int icp, BOOL fTrailing, int* pX)
{
- FIXME("(%p), %d, %d, (%p): stub\n", ssa, icp, fTrailing, pX);
- *pX = 0; /* Set a reasonable value */
- return S_OK;
+ int i, j;
+ int runningX = 0;
+ int runningCp = 0;
+ StringAnalysis* analysis = ssa;
+ TRACE("(%p), %d, %d, (%p)\n", ssa, icp, fTrailing, pX);
+
+ if(!ssa || !pX)
+ {
+ return 1;
+ }
+
+ /* icp out of range */
+ if(icp < 0)
+ {
+ analysis->invalid = TRUE;
+ return E_INVALIDARG;
+ }
+
+ for(i=0; i<analysis->numItems; i++)
+ {
+ for(j=0; j<analysis->glyphs[i].numGlyphs; j++)
+ {
+ if(runningCp == icp && fTrailing == FALSE)
+ {
+ *pX = runningX;
+ return S_OK;
+ }
+ runningX += analysis->glyphs[i].piAdvance[j];
+ if(runningCp == icp && fTrailing == TRUE)
+ {
+ *pX = runningX;
+ return S_OK;
+ }
+ runningCp++;
+ }
+ }
+
+ /* icp out of range */
+ analysis->invalid = TRUE;
+ return E_INVALIDARG;
}
/***********************************************************************
